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States → EPA Region 8 — Tribal Water Systems

Non-Transient Non-Community Water System · PWS 084690468

Crazy Horse School

Wanblee, EPA Region 8 — Tribal Water Systems 57577 - drinking water served from surface water sources to 360 people, tracked in EPA SDWIS and UCMR5.

360
People served
71
EPA violations
20
Health-based
Untested
UCMR5 result

The verdict

EPA records 71 drinking-water violations at Crazy Horse School, 28% of them health-based.

71
Total EPA violations on record
28%
Health-based (MCL / treatment failure)
360
People served by this system
N/A
PFAS compounds detected (UCMR5)

Water Quality Snapshot: Crazy Horse School

Crazy Horse School is a federal-owned non-transient non-community water system that delivers drinking water to 360 residents in Wanblee, EPA Region 8 — Tribal Water Systems through 33 service connections. Its water is drawn from surface water sources. EPA's Safe Drinking Water Information System records 71 total violations for this system , of which 20 (28%) are health-based, meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 43 monitoring and reporting violations are on file. The most recent violation on record dates to 2025.

The most frequently cited contaminant at this system is Coliform (TCR), recorded in 19 violations (MCL, health-based). This system has not yet been sampled under EPA's UCMR5 PFAS monitoring program, so no PFAS detection data is available here.

EPA Region 8 — Tribal Water Systems has thousands of regulated public water systems tracked by EPA under the Safe Drinking Water Act.

All figures above are sourced directly from EPA SDWIS and UCMR5 public data releases and are updated as EPA publishes new reporting cycles.

Population Served
360
Total Violations
71
Health-Based Violations
20
Water Source
Surface Water

System Details

System Type
Non-Transient Non-Community
Owner Type
Federal
Connections
33
School/Daycare
Yes
MCL Violations
19
Monitoring Violations
43
Treatment Tech Violations
1

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Coliform (TCR) MCL 19 2007
Coliform (TCR) MR 17 2005
Lead and Copper Rule MR 15 2023
Consumer Confidence Rule Other 7 2011
Nitrate MR 2 2009
Total Haloacetic Acids (HAA5) MR 2 2025
Surface Water Treatment Rule MR 2 2023
TTHM MR 2 2025
Gross Alpha, Excl. Radon and U MR 2 1982
Revised Total Coliform Rule MON 1 2023
Long Term 2 Enhanced Surface Water Treatment Rule TT 1 2018

Verify This Water System

The figures above are aggregated from EPA's public databases. To verify the underlying records, or to file a complaint, request a Consumer Confidence Report, or check current monitoring status, go directly to the federal and state regulators that enforce the Safe Drinking Water Act for Crazy Horse School.

Federal Source of Truth

EPA SDWIS, Federal Reports

EPA's Safe Drinking Water Information System (SDWIS) holds the federal compliance record for every regulated public water system. Open the system-level report by PWS ID:

View PWS ID 084690468 on SDWIS

Source: EPA SDWIS Federal Reports Search

State Regulator

EPA Region 8 — Tribal Water Systems Drinking Water Authority

EPA Region 8 — Tribal Water Systems's primacy agency administers the Safe Drinking Water Act locally. Search EPA SDWIS for the current state contact, or use the state's public health or environment department portal.

Find 08 regulator via EPA SDWIS

Violation Timeline

Each row links to the EPA SDWIS public record for verification. Cross-reference the contaminant code on EPA's federal report to see violation dates, return-to-compliance status, and enforcement actions.

Year (latest) Contaminant Category Count EPA Record
2025 Total Haloacetic Acids (HAA5) MR 2 SDWIS / 084690468 / 2456
2025 TTHM MR 2 SDWIS / 084690468 / 2950
2023 Lead and Copper Rule MR 15 SDWIS / 084690468 / 5000
2023 Surface Water Treatment Rule MR 2 SDWIS / 084690468 / 0200
2023 Revised Total Coliform Rule MON 1 SDWIS / 084690468 / 8000
2018 Long Term 2 Enhanced Surface Water Treatment Rule TT 1 SDWIS / 084690468 / 0800
2011 Consumer Confidence Rule Other 7 SDWIS / 084690468 / 7000
2009 Nitrate MR 2 SDWIS / 084690468 / 1040
2007 Coliform (TCR) MCL 19 SDWIS / 084690468 / 3100
2005 Coliform (TCR) MR 17 SDWIS / 084690468 / 3100
1982 Gross Alpha, Excl. Radon and U MR 2 SDWIS / 084690468 / 4000

How Crazy Horse School Compares

Cross-reference this system's record against state averages and the federal MCL framework for context.

Metric Crazy Horse School EPA Region 8 — Tribal Water Systems avg Federal benchmark
Total violations 71 - SDWA compliance, any non-zero count is a recorded breach
Health-based violations 20 - Indicates a contaminant exceeded a federal MCL
PFAS detection None - EPA final rule (2024): PFOA/PFOS MCL = 4.0 ppt
Population served 360 - Sizing context for compliance burden

Sources: EPA SDWIS and EPA National Primary Drinking Water Regulations (40 CFR Part 141). State averages computed across all regulated public water systems in EPA Region 8 — Tribal Water Systems.

Federal MCL reference, Safe Drinking Water Act thresholds ▼
Contaminant Federal MCL / Action Level Note
Lead 0 mg/L (Action Level: 0.015 mg/L) Lead and Copper Rule treatment technique
Arsenic 0.010 mg/L (10 ppb) Health-based MCL since 2006
Total Coliform Treatment technique (RTCR) Indicator organism, monitoring trigger
PFOA / PFOS (PFAS) 4.0 ppt each (final 2024 rule) Compliance deadline 2029 (EPA proposed extending to 2031, not yet final as of May 2026)
Nitrate (as N) 10 mg/L Acute health risk for infants

Frequently Asked Questions

Is Crazy Horse School water safe to drink? ▼
Crazy Horse School (PWS ID: 084690468) has 71 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 360 people using Surface Water sources.
How many people does Crazy Horse School serve? ▼
Crazy Horse School serves 360 people in Wanblee, EPA Region 8 — Tribal Water Systems. It is a Federal-owned system using Surface Water water sources with 33 service connections.
What type of violations does Crazy Horse School have? ▼
Crazy Horse School has 71 total violations: 20 health-based violations (MCL exceedances or treatment failures), 43 monitoring/reporting violations, and 1 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in Crazy Horse School water? ▼
No PFAS testing data is available for Crazy Horse School under the EPA's UCMR5 monitoring program.
What water source does Crazy Horse School use? ▼
Crazy Horse School uses Surface Water as its primary water source. It is classified as a Non-Transient Non-Community Water System, serving the same people for at least 6 months per year.
Where does this data come from? ▼
All data comes from the EPA Safe Drinking Water Information System (SDWIS) and the UCMR5 PFAS monitoring program. SDWIS tracks compliance for all public water systems regulated under the Safe Drinking Water Act.
Data Sources: EPA Safe Drinking Water Information System (SDWIS), Q4 2025. This data is provided for informational purposes only.

Read our methodology - how this data is sourced, computed, and verified.

Data sourced from EPA SDWIS and UCMR5 PFAS monitoring data. See our methodology for details. Retrieved and formatted by PlainWater Editorial

Every figure on PlainWater is rendered directly from EPA SDWIS drinking-water data, no number is typed in by an editor. This system's figures are rendered directly from EPA SDWIS data, no figure is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.